Effect of LED Lights on Morphological Construction and Leaf Photosynthesis of Lettuce (<i>Lactuca sativa</i> L.)
During the overwintering production of lettuce in solar greenhouses, there exist a short duration of sunlight and low light intensity, which are detrimental to the growth and development of lettuce. Supplemental lighting is an effective solution to this issue. This study aims to explore the influenc...
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MDPI AG
2025-01-01
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| Series: | Horticulturae |
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| author | Jianlei Qiao Wen Hu Shanshan Chen Hongbo Cui Jiangtao Qi Yue Yu Shuang Liu Jianfeng Wang |
| author_facet | Jianlei Qiao Wen Hu Shanshan Chen Hongbo Cui Jiangtao Qi Yue Yu Shuang Liu Jianfeng Wang |
| author_sort | Jianlei Qiao |
| collection | DOAJ |
| description | During the overwintering production of lettuce in solar greenhouses, there exist a short duration of sunlight and low light intensity, which are detrimental to the growth and development of lettuce. Supplemental lighting is an effective solution to this issue. This study aims to explore the influence of adding different wavelengths of red light to white LEDs for supplemental lighting on the growth and photosynthesis of lettuce leaves in solar greenhouses. Four experimental zones were established, namely white LED + 630 nm (T1), white LED + 660 nm (T2), white LED + 690 nm (T3), and no supplemental lighting (CK). The results indicate that supplemental lighting significantly increased the plant height, leaf area, biomass, and root indices. The chlorophyll content measurements showed higher photosynthetic pigment levels in the treated plants, enhancing the net photosynthesis rate (Pn). Thus, the combination of red and white light provides a more comprehensive spectrum and enhances the photosynthetic capacity of plant leaves. Simultaneously, under supplemental lighting, the plant fluorescence parameters Y(II), Fv/Fm, qP, and ETR were significantly elevated. It was found from the chlorophyll fluorescence frequency distribution graph that the leftward shift in Y(II) in the control group (CK) indicated that it was in a state of weak light stress, but supplemental lighting effectively ameliorated this stress environment. Among the types of supplemental lighting, the combination of white LEDs with 660 nm red light provides the most significant improvement in the growth and photosynthetic characteristics of lettuce under winter greenhouse conditions, and this combination holds great application potential in winter greenhouse lettuce production. |
| format | Article |
| id | doaj-art-7e8452623d6f45db9d1ac3ce06e16cb1 |
| institution | Kabale University |
| issn | 2311-7524 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Horticulturae |
| spelling | doaj-art-7e8452623d6f45db9d1ac3ce06e16cb12025-01-24T13:34:35ZengMDPI AGHorticulturae2311-75242025-01-011114310.3390/horticulturae11010043Effect of LED Lights on Morphological Construction and Leaf Photosynthesis of Lettuce (<i>Lactuca sativa</i> L.)Jianlei Qiao0Wen Hu1Shanshan Chen2Hongbo Cui3Jiangtao Qi4Yue Yu5Shuang Liu6Jianfeng Wang7College of Horticulture, Jilin Agricultural University, Changchun 130118, ChinaCollege of Horticulture, Jilin Agricultural University, Changchun 130118, ChinaCollege of Horticulture, Jilin Agricultural University, Changchun 130118, ChinaJilin Academy of Vegetable and Flower Sciences, Changchun 130119, ChinaSchool of Biological and Agricultural Engineering, Jilin University, Changchun 130025, ChinaCollege of Horticulture, Jilin Agricultural University, Changchun 130118, ChinaCollege of Horticulture, Jilin Agricultural University, Changchun 130118, ChinaJilin Academy of Vegetable and Flower Sciences, Changchun 130119, ChinaDuring the overwintering production of lettuce in solar greenhouses, there exist a short duration of sunlight and low light intensity, which are detrimental to the growth and development of lettuce. Supplemental lighting is an effective solution to this issue. This study aims to explore the influence of adding different wavelengths of red light to white LEDs for supplemental lighting on the growth and photosynthesis of lettuce leaves in solar greenhouses. Four experimental zones were established, namely white LED + 630 nm (T1), white LED + 660 nm (T2), white LED + 690 nm (T3), and no supplemental lighting (CK). The results indicate that supplemental lighting significantly increased the plant height, leaf area, biomass, and root indices. The chlorophyll content measurements showed higher photosynthetic pigment levels in the treated plants, enhancing the net photosynthesis rate (Pn). Thus, the combination of red and white light provides a more comprehensive spectrum and enhances the photosynthetic capacity of plant leaves. Simultaneously, under supplemental lighting, the plant fluorescence parameters Y(II), Fv/Fm, qP, and ETR were significantly elevated. It was found from the chlorophyll fluorescence frequency distribution graph that the leftward shift in Y(II) in the control group (CK) indicated that it was in a state of weak light stress, but supplemental lighting effectively ameliorated this stress environment. Among the types of supplemental lighting, the combination of white LEDs with 660 nm red light provides the most significant improvement in the growth and photosynthetic characteristics of lettuce under winter greenhouse conditions, and this combination holds great application potential in winter greenhouse lettuce production.https://www.mdpi.com/2311-7524/11/1/43LED supplemental lightinglettucegrowthphotosynthesisfluorescence parameters |
| spellingShingle | Jianlei Qiao Wen Hu Shanshan Chen Hongbo Cui Jiangtao Qi Yue Yu Shuang Liu Jianfeng Wang Effect of LED Lights on Morphological Construction and Leaf Photosynthesis of Lettuce (<i>Lactuca sativa</i> L.) Horticulturae LED supplemental lighting lettuce growth photosynthesis fluorescence parameters |
| title | Effect of LED Lights on Morphological Construction and Leaf Photosynthesis of Lettuce (<i>Lactuca sativa</i> L.) |
| title_full | Effect of LED Lights on Morphological Construction and Leaf Photosynthesis of Lettuce (<i>Lactuca sativa</i> L.) |
| title_fullStr | Effect of LED Lights on Morphological Construction and Leaf Photosynthesis of Lettuce (<i>Lactuca sativa</i> L.) |
| title_full_unstemmed | Effect of LED Lights on Morphological Construction and Leaf Photosynthesis of Lettuce (<i>Lactuca sativa</i> L.) |
| title_short | Effect of LED Lights on Morphological Construction and Leaf Photosynthesis of Lettuce (<i>Lactuca sativa</i> L.) |
| title_sort | effect of led lights on morphological construction and leaf photosynthesis of lettuce i lactuca sativa i l |
| topic | LED supplemental lighting lettuce growth photosynthesis fluorescence parameters |
| url | https://www.mdpi.com/2311-7524/11/1/43 |
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